Dispensing apparatus for liquids



D. A. ZURBRIGG.

DISPENSING APPARATUS FOR LIQUIDS.

APPLICAHON FILED AUG-6, 1920- 4 I I /0 v glvwntoz Witness V PatentedOct. 10, 1922.

UNITED STATES mac PATENT outta,

DANIEL A ZURBRIGG, 0F MILFORD, DELAWARE, ASSIGNOR TO L. D. CAULKCOMPANY, OF MILFORD, DELAWARE, A CORPORATION OF DELAWARE.

DISPENSING APPARATUS FOR LIQUIDS.

Application filed August 6, 1920. Serial No. 401,726.

To all who m,- z't mag concern:

Be it known that I, DANIEL A. ZU'RBRIGG, a citizen of the United States,residing at Milford, in the county of Kent and State of Delaware, haveinvented new and useful Improvements in Dispensing Apparatus forLiquids, of which the following is a specification.

This invention relates to a new appliance or dispensing apparatus havingan adjustable feature adapted to automatically control the delivery ofliquids at a uniform rate and has more particular reference to thedelivery of a liquid anesthetic under proper flow regulation.

' This invention enables a person admin istering the anesthetic toadjust the delivery of the same with absolute regularity, the quantityand amount being variable with each separate and individual patient. Itis a well known fact that in the manner of anesthetizing as generallypracticed, (ether or chloroform being here taken as examples) liquidanesthetic agents are poured from comparatively large containers inintermittent, haphazard, unmeasured quantities, onto a porous absorbentmaterial. This latter may or may not be confined in a cribbing, cone ormask of some impervious compound.

The patient breathes through the meshes of the porous absorbentmaterial, the air so inhaled being perforce surcharged with the vaporsof the anesthetizing agent.

It is apparent that the method of administering intermittent charges ofrelatively large unmeasured quantities of the anesthetizing agent to thepatient is unscientific, and results in a very uneven anesthesia,detrimental if not hazardous, alike to the patient operated on and theoperating surgeon,

.whose skill is largely interfered with and sometimes nullified by theunstable anesthesia induced by the careless method of administrationwhich is too frequently employed in work of this character.

The device constituting an embodiment of my invention, whichaccomplishes the desideratum of furnishing a means for administering aliquid anesthetic at the desired rate with perfect unvarying regularity,is

described in the following specification in connection with theaccompanying drawing.

In the drawing 2- Figure l is a side elevation of my improved dispensingapparatus in closed position;

Figure 2 is a section taken through the container and stopper showing aplan view of the stem and the tapered recess therein;

Figure 3 is a sectional view of the apparatus with a portion broken awayto permit the entrance of air and showing the stem in operativeposition;

Figure 4 is a sectional view of the stem taken on the line li, Figure 2,looking in the direction of the arrows;

Figure 5 is a plan view of a modified form of my invention showing adifferent form of recess in the stem; and

Figure 6 is a partial sectional view of the modification shown in Figure5.

The numeral 10 designates a container which is preferably in the form ofa glass tube having a reduced extension 11 at one end and a neck portion12 at the other end provided with an opening adapted to tightly receivea stopper 13. The extension 11 is preferably reduced to almost a pointat the terminal 14 so that this terminal may be readily broken off andthus provide a capillary opening through which air may have access intothe interior of the container.'

The stopper 13 is preferably of cork and is formed with a centralaperture 15 adapted to receive a stem 16 with a tight sliding fit. Asshown in Figures 1, 2, 3 and 4 the stem is in the form of a cylindricalpiece of glass having plain cylindrical ends 17 and 18 and providedintermediate these ends with a recess 19 which preferably tapers indepth and width from the point 20 to the surface 21 where said recesshas its largest cross sectional area. It is apparent that either end ofthe glass stopper 17 or 18 may be used in conjunction with the stopper13 in order to close the aperture therein, but when in operativeposition the recess 19 communicates with the interior of the containerand afiords an outlet passage for the liquid within the containerinasmuch as the recess 19 is .of

Eli

sired period.

greater longitudinal dimension than the stopper 13. By adjustingthe stem18 within the stopper the effective sectional area of this outletpassage m'a be regulated and any deslred section mamtained for the de-In Figures and 6 a rectangular recess 19' is, shown which has a taperingbottom cated that a plain cylindrical surface is presented to theinterior of the stopper 13.

The container is thus completely closed andthe liquid may be transferredto a distance in this condition if desired. In order to prepare for theadministration of the anesthetic the reduced terminal 14 of thecontainer is broken ofl so as to provide a passage for the air to theinterior of the container and stem 16 is forced through the aperture ofthe stopper 13 until therecess therein provides an outlet passage forthe liquid. The

container is turned until the recess 19 is located on the bottom of thestem and the stem isadjusted until the desired fiow of the liquidanesthetic, on the absorbent material through which the patientbreathes, is obtained. If a larger flow of liquid is desired the stemmay be adjusted so as to provide a larger cross sectional area for theflow of the liquid and if a smaller flow is desired, the stem may beadjusted in the opposite direction. Thus a uniform flow of the desiredvolume may be obtained which will produce anesthesia gradually andwithout discomfort to the patient, and the patient may be maintained ina proper state of anesthesia for an indefinite time giving betterworking conditions to the operating surgeon. Also the recovery ofconsciousness by the patient is accomplished without nausea or any otheruntoward after eflects which frequently result from the irregularadminissaid outlet passage.

opening may be completely closed or an outlet passage of variable areaafforded by said recess for the contents of said container.

2. In a dispensing apparatus for liquids, a

container having an extension of reduced be closed or opened to'variousextents de-v pending upon the longitudinal positionv of said stem withinthe apertureo said stoppern v a container normally completely closed forholding a liquid, said container having a portion which is readilybreakable to afford communication between the air and the-interior ofthe container, a stopper associated with an opening insaid container andmeans slidingly engaging said stopper to regulate the flow of liquidfrom said container.

5. In a dispensing apparatus for liquids, a container having an openingtherein, a stopper fitting within said opening, said stopper beingformed with an aperture, a stem having a tight sliding fit within saidaperture and provided intermediate its ends with a longitudinallyextending recess whereby either of the end portions of said stem may actas a complete closure for said aperture and the intermediate portion asa partial closure for the same.

6. In a dispensing apparatus for liquids, a container having an openingand a reduced extension, breakable to provide a capillary entrance forair, and an adjustable closure for said opening to regulate the flow ofliquid from the container after said breaking operation. I v

7. In a dispensing apparatus for liquids, a container having an outletpassage and a breakable portion adapted to provide an entrance for airand means for completely closing or regulating the effective area of 8.In a dispensing apparatus for liquids, a container having an outlet forthe liquid contents and a normallyclosed inlet adapted to be opened topermit the entrance of air during the dispensing operation, and meansfor completely closing or regulating the effective area of said outlet.

9. In a dispensing apparatus for liquids, a container having an outletfor the liquid contents, a normally closed inlet adapted to 4. In adispensing apparatus for liquids,

1,431,860 I r g be opened'to permit the entrance of air dur- Intestimony whereof I have hereunto set ing'the dispensing operation andmeans for my hand in presence of two subscribing witcompletely closingor regulating the effective nesses.

area of said outlet comprising an apertured DANIEL A. ZURBRIGG. stopperfitting tightly within said outlet, Witnesses: and a stem movablerelatively to sald stopper H. C. MITTEN,

and having a tapered recess formed therein. W. S. DAUGHERTY.

